This circuit was found in Motorola documentation from 1968. SCRs can be modern equivalents and the maximum load is 5 A at 40 V.
September 2017 - Microchip's MCP6411 operational amplifiers for frequencies up to 1 MHz are in...
This circuit was found in a Radio Electronics Constructor, English magazine from April 1976; The...
The purpose of this circuit is to maintain the liquid level of a reservoir between two values...